Alert ClusterProxyApplySlow: The cluster is taking too long, on average, to apply kubernetes service rules to iptables.

Solution Verified - Updated -

Issue

  • OpenShift cluster regularly logs message:

Alert ClusterProxyApplySlow: The cluster is taking too long, on average, to apply kubernetes service rules to iptables.

Environment

  • Red Hat OpenShift Container Platform
  • Kubernetes networking plugin which relies on container host iptables firewall to provide networking to containers

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